import cv2

src = cv2.imread('PNG/1_Color.png')
gray = cv2.cvtColor(src, cv2.COLOR_BGR2GRAY)
img = cv2.medianBlur(gray, 7)
cv2.imshow('circle',gray)
circles = cv2.HoughCircles(img,cv2.HOUGH_GRADIENT,1,60,param1=100,param2=30)
print(circles)
for x, y, r in circles[0]:
    cv2.circle(src,(int(x),int(y)),int(r),(0,0,255),thickness=2,lineType=cv2.LINE_AA)

cv2.imshow('circle',src)
cv2.waitKey(0)
cv2.destroyAllWindows()